ISO 7240-3:2020

INTERNATIONAL ISO
STANDARD 7240-3
Second edition
2020-03
Fire detection and alarm systems —
Part 3:
Audible alarm devices
Systèmes de détection et d'alarme d'incendie —
Partie 3: Dispositifs d'alarme sonores
Reference number
ISO 7240-3:2020(E)
©
ISO 2020

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ISO 7240-3:2020(E)

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© ISO 2020
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ISO 7240-3:2020(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 3
4 Requirements . 3
4.1 Compliance . 3
4.2 Sound pressure level . 3
4.3 Frequency and sound pattern . 3
4.4 Audible alarm devices (AADs) with voice . 4
4.5 Synchronization — Optional function . 4
4.6 Construction . 4
4.6.1 Provision for external conductors . 4
4.6.2 Materials . 5
4.6.3 Ingress protection . 5
4.6.4 Access . 5
4.7 On-site adjustment of the mode of operation . 5
4.8 Durability . 5
5 Tests . 6
5.1 General . 6
5.1.1 Atmospheric conditions for tests. 6
5.1.2 Operating conditions for tests . 6
5.1.3 Mounting arrangements . 6
5.1.4 Tolerances . 6
5.1.5 Provision for tests . 7
5.1.6 Test schedule . 7
5.1.7 Test report . 8
5.2 Reproducibility . 8
5.2.1 Object of the test . 8
5.2.2 Test procedure . 8
5.2.3 Requirements . 8
5.3 Operational performance. 9
5.3.1 Object of the test . 9
5.3.2 Test procedure . 9
5.3.3 Requirements . 9
5.4 Durability . 9
5.4.1 Object of the test . 9
5.4.2 Test procedure . 9
5.4.3 Requirements . 9
5.5 Dry heat (operational) . 9
5.5.1 Object of the test . 9
5.5.2 Test procedure and apparatus .10
5.5.3 Requirements .10
5.6 Dry heat (endurance) .10
5.6.1 Object of the test .10
5.6.2 Test procedure .11
5.6.3 Requirements .11
5.7 Cold (operational) .11
5.7.1 Object of the test .11
5.7.2 Test procedure .11
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ISO 7240-3:2020(E)

5.7.3 Requirements .12
5.8 Damp heat, cyclic (operational) .12
5.8.1 Object of the test .12
5.8.2 Test procedure .12
5.8.3 Requirements .13
5.9 Damp heat, steady state (endurance) .13
5.9.1 Object of the test .13
5.9.2 Test procedure .13
5.9.3 Requirements .14
5.10 Damp heat, cyclic (endurance) .14
5.10.1 Object of the test .14
5.10.2 Test procedure .14
5.10.3 Requirements .14
5.11 Sulphur dioxide (SO ) corrosion (endurance).14
2
5.11.1 Object of the test .14
5.11.2 Test procedure .14
5.11.3 Requirements .15
5.12 Shock (operational) .15
5.12.1 Object of the test .15
5.12.2 Test procedure .15
5.12.3 Requirements .16
5.13 Impact (operational) .16
5.13.1 Object of the test .16
5.13.2 Test procedure .16
5.13.3 Requirements .17
5.14 Vibration, sinusoidal (operational) .17
5.14.1 Object of the test .17
5.14.2 Test procedure .17
5.14.3 Requirements .17
5.15 Vibration, sinusoidal (endurance) .18
5.15.1 Object of the test .18
5.15.2 Test procedure .18
5.15.3 Requirements .18
5.16 Electromagnetic compatibility (EMC), immunity (operational) .19
5.16.1 Object of the tests .19
5.16.2 Test procedures.19
5.16.3 Requirements .19
5.17 Enclosure protection .20
5.17.1 Object of the test .20
5.17.2 Test procedures.20
5.17.3 Requirements .21
5.18 Operational performance for AADs with voice .21
5.18.1 Object of the test .21
5.18.2 Test procedure .21
5.18.3 Requirements .21
5.19 Sequence timing for AADs with voice .21
5.19.1 Object of the test .21
5.19.2 Test procedure .21
5.19.3 Measurements during conditioning .22
5.19.4 Requirements .22
5.20 Synchronization (optional) .22
5.20.1 Object of the test .22
5.20.2 Test procedure .22
5.20.3 Measurements during conditioning .23
5.20.4 Test requirements .23
6 Test report .23
7 Marking .24
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ISO 7240-3:2020(E)

8 Data .24
Annex A (normative) Sound pressure level test for AAD .27
Annex B (normative) Comparative sound pressure level test during environmental
conditioning .31
Annex C (informative) Comparison of flammability test requirements in various standards .36
Bibliography .38
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ISO 7240-3:2020(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 3, Fire detection and alarm systems.
This second edition cancels and replaces the first edition (ISO 7240-3:2010), which has been technically
revised. The main changes compared to the previous edition are as follows:
— EN 50130-4 has been replaced with IEC 62599-2 in 5.16.2.1 (electromagnetic compatibility
immunity test);
— marking has been moved to a new Clause 7;
— data and software have been moved to a new Clause 8.
A list of all parts in the ISO 7240 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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ISO 7240-3:2020(E)

Introduction
In a fire detection and alarm system, the purpose of the audible alarm devices is to warn person(s)
within, or near, a building of the occurrence of a fire emergency to enable such a person(s) to take
appropriate measures.
Audible alarm devices using voice messages are also for warning the occupants of a building of the
occurrence of a fire risk. These use a combination of an attention-drawing signal and dedicated voice
message(s). Additional requirements, test methods and performance criteria specific to audible alarm
devices with voice are also incorporated in this document.
ISO 8201 specifies the temporal pattern and the required sound pressure level of an audible emergency
evacuation signal.
This document recognizes that the exact nature of the sound requirements, i.e. its frequency range,
temporal pattern and output level, will vary according to the nature of the installation, the type of risk
present and appropriate measures to be taken, the type of danger signals used by other non-evacuation
alarms (see for example ISO 7731) and national differences in custom and practice. The resulting
standard specifies, therefore, a common method for testing of the operational performance of audible
alarm devices against the specification declared by the manufacturer, rather than imposing common
requirements.
This document gives common requirements for the construction and robustness of audible alarm
devices, as well as for their performance under climatic, mechanical and electrical interference
conditions which are likely to occur in the service environment. Audible alarm devices have been
classified in either an indoor or an outdoor application environment category.
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INTERNATIONAL STANDARD ISO 7240-3:2020(E)
Fire detection and alarm systems —
Part 3:
Audible alarm devices
1 Scope
This document specifies the requirements, test methods and performance criteria for audible alarm
devices intended to signal an audible warning, with or without voice messages between a fire detection
and fire alarm system and the occupants of a building.
This document specifies fire alarm audible alarm devices for two types of application environment,
type A for indoor use and type B for outdoor use.
This document is not applicable to:
a) loudspeaker-type devices primarily intended for emitting emergency voice messages that are
generated from an external audio source;
b) supervisory audible alarm devices, e.g. within the control and indicating equipment.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 7240-1, Fire detection and alarm systems — Part 1: General and definitions
IEC 60068-1, Environmental testing — Part 1: General and guidance
IEC 60068-2-1, Environmental testing — Part 2-1: Tests — Test A: Cold
IEC 60068-2-2, Environmental testing — Part 2-2: Tests — Test B: Dry heat
IEC 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
IEC 60068-2-27, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
IEC 60068-2-30, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h cycle)
IEC 60068-2-42, Environmental testing — Part 2-42: Tests — Test Kc: Sulphur dioxide test for contacts and
connections
IEC 60068-2-75, Environmental testing — Part 2-75: Tests — Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
IEC 60529, Degrees of protection provided by enclosures (IP code)
IEC 60695-11-10, Fire hazard testing — Part 11-10: Test flames — 50 W horizontal and vertical flame
test methods
IEC 60695-11-20, Fire hazard testing — Part 11-20: Test flames — 500 W flame test methods
IEC 61672-1:2002, Electroacoustics — Sound level meters — Part 1: Specifications
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ISO 7240-3:2020(E)
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